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NCJ Number: 240230 Add to Shopping cart Find in a Library
Title: Unobtrusive Suicide Warning System, Final Technical Report
Author(s): Jeffrey M. Ashe; Meena Ganesh; Lijie Yu; Catherine Graichen; Ken Welles; Bill Platt; Joy Chen
Date Published: October 2011
Page Count: 151
Sponsoring Agency: National Institute of Justice (NIJ)
Washington, DC 20531
NCJRS Photocopy Services
Rockville, MD 20849-6000
Grant Number: 2007-DE-BX-K176
Sale Source: NCJRS Photocopy Services
Box 6000
Rockville, MD 20849-6000
United States of America
Document: PDF
Type: Report (Technical)
Format: Document; Document (Online)
Language: English
Country: United States of America
Annotation: This final report presents the findings of a study that examined an unobtrusive suicide warning system for use in correctional institutions.
Abstract: This report presents the findings of phase II of a three phase project to develop an unobtrusive suicide warning system for use in correctional institutions. The suicide warning system is designed to measure an inmate’s heart rate, breathing, and general body motions without being attached to the inmate’s body. The system uses a modified commercialized range controlled radar that is used as a motion detector for home security systems. Phase I of the research was completed in March 2009. The results of phase II, completed in December 2010, are presented in this report and include the following: 1) improvement of the state estimation algorithms by inclusion of the continuous wavelet transform and stationary wavelet transform, leading to an overall diagnostic accuracy of 83 percent for motion, still, and concern states; 2) improvements to rate algorithms for use in rate estimation leading to 15 percent accuracy while retaining about 50 percent of all estimates; 3) improvements to alarming algorithms that alert when the subject is in a concern state – use with test subjects led to a false alarm rate of less than 6 percent; and 4) development of a near-real time implementation of the system. The report also presents information on the final phase of the project which is to design a hardened system for long-term use in an operational setting. Tables, figures, references, and appendixes
Main Term(s): Inmate suicide
Index Term(s): Mental health; Mentally ill inmates; NIJ grant-related documents; Offender mental health services; Suicide; Suicide prevention
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